<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style>
        table {
            border: 1px solid #888;
            width: 600px;
            margin: 100px auto;
        }

        th,td {
            border: 1px solid #555;
            text-align: center;
        }
    </style>
  </head>
  <body>
    <div id="app">
      <table>
        <caption>
          欢迎光临_vue开发的收银系统_水果店
        </caption>
        <tr>
          <th>苹果 10￥ / 斤，折扣&lt;8折&gt;</th>
        </tr>
        <tr>
          <td>
            请输入你要购买的斤数
            <input type="number" v-model="num"/>
          </td>
        </tr>
        <tr>
          <td>
            <button @click="total = num * 10">结账买单</button>
          </td>
        </tr>
        <tr>
          <td>
            结账单：总价：{{  total }}￥元 折后价：{{ total * .8 }}￥元 省了：{{ total * .2 }}￥元
          </td>
        </tr>
      </table>
    </div>
    <script src="./vue.js"></script>
    <script>
      new Vue({
        el: '#app',
        data () {
          return {
            num: 0,
            total: 0
          }
        },
        methods: {}
      })
    </script>
  </body>
</html>
